Hello, I would like to use valgrind to check for memory errors in vpp.
I understand that running something through valgrind makes it very very slow so that it is not an option for real production usage of vpp. However, valgrind is still very useful for finding errors even if it's only for very limited test runs, so I would very much like to make that work. I know that vpp has some built-in checking for memory leaks, but the reason I want to use valgrind is not primarily to check for memory leaks but to check for other kinds of memory-access-related errors, like the "invalid read" and "invalid write" errors that valgrind can detect. So far, what I have done is to build vpp (debug configuration) according to the instructions here: https://fdio-vpp.readthedocs.io/en/latest/gettingstarted/developers/building.html Then I stopped the vpp service since I want to run vpp from the command-line through valgrind, and finally I run it like this: sudo valgrind vpp -c /etc/vpp/startup.conf That gave warnings about "client switching stacks?" and suggested adding --max-stackframe=137286291952 so I did that: sudo valgrind --max-stackframe=137286291936 vpp -c /etc/vpp/startup.conf Then valgrind gives a warning "Warning: set address range perms: large range" followed by some error reports of the type "Conditional jump or move depends on uninitialised value(s)" inside the mspace_malloc routine in dlmalloc.c. I think these issues are probably related to the fact that vpp uses its own malloc implementation (in dlmalloc.c) instead of the default malloc, possibly combined with the fact that vpp uses very large (virual) memory. Questions: - Are there ways to configure vpp to allow it to work together with valgrind? - Are there ways to make vpp use less memory? (currently "top" shows 0.205t VIRT memory usage for the vpp_main process) - Is it possible to somehow configure vpp to use standard malloc instead of the dlmalloc.c implementation, perhaps sacrificing performance but making things work better with valgrind? Best regards, Elias
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